Have you checked out Duolingo's Japanese course yet?I used it a bit a while ago. It doesn't have a huge amount.
It's pretty good for an intro, but it doesn't have much beyond that.
I have been reading a lot about resources.
The Japanese N5 test is basically covered by Duolingo. Roughly the same level as using Genki I (I think a little less in Kanji). I'm towards the end of Genki I.
Then Genki II basically covers the N4 test. I already have this book.